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  1. Core Server
  2. SERVER-21155

Only parse oplog entries once during replication (apply phase)

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • None
    • 3.2.0-rc3
    • Replication
    • None
    • Fully Compatible
    • Repl B (10/30/15), Repl C (11/20/15)

    Description

      Once the oplog entries are fetches from the upstream source the same fields, "ns", "op", "ts" and others are repeatedly read from the same entry causing lots of extra parsing/work.

      One possible solution is to create a simple struct to wrap the BSONObj which caches the well-known fields:

      • ts
      • ns
      • op
      • o (optional)
      • o2 (optional)
      • o/o2._id (optional)

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        Issue Links

          is depended on by

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-21107 Improve protocol version 1 replication throughput

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-21154 Prepare Apply Batches Outside of Applier Thread

          • Major - P3 - Major loss of function.
          • Closed

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              scotthernandez Scott Hernandez (Inactive)
              scotthernandez Scott Hernandez (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: